reformat
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@ -72,7 +72,7 @@ CC ?= gcc
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CXX ?= g++
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# I added O0 to allow paging/bluescreen to work (We need the ebp on the stack)
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CFLAGS := $(CFLAGS) -O0 -m32 -march=i486 -Wall -fno-stack-protector -nostdlib -I. -g -ffreestanding -fno-pie -fno-pic -mpreferred-stack-boundary=2 -Wno-write-strings -mno-sse -mno-sse2 -mmanual-endbr
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CFLAGS := $(CFLAGS) -O0 -m32 -march=i486 -Wall -fno-stack-protector -nostdlib -I. -g -ffreestanding -fno-pie -fno-pic -Wno-write-strings -mno-sse -mno-sse2 -mmanual-endbr -mpreferred-stack-boundary=2
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# I added -std=c++17 for if constexpr, but it isn't necessary for anything critical
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# Needed for template concepts, but we don't have it available: -std=c++20
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@ -11,17 +11,20 @@
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#include "kernel/Globals.h"
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CPU cpu; // CPU-spezifische Funktionen
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PCSPK pcspk; // PC-Lautsprecher
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CGA_Stream kout; // Ausgabe-Strom fuer Kernel
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Keyboard kb; // Tastatur
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IntDispatcher intdis; // Unterbrechungsverteilung
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BIOS bios; // Schnittstelle zum 16-Bit BIOS
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VESA vesa; // VESA-Treiber
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PIC pic; // Interrupt-Controller
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unsigned int total_mem; // RAM total
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unsigned long systime = 0;
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IntDispatcher intdis; // Unterbrechungsverteilung
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PIT pit(10000);
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Keyboard kb; // Tastatur
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PCSPK pcspk; // PC-Lautsprecher
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// BumpAllocator allocator;
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// LinkedListAllocator allocator;
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TreeAllocator allocator;
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Scheduler scheduler;
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BIOS bios; // Schnittstelle zum 16-Bit BIOS
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VESA vesa; // VESA-Treiber
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PIT pit(10000);
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unsigned int total_mem; // RAM total
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unsigned long systime = 0;
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@ -13,6 +13,7 @@
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#include "devices/CGA_Stream.h"
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#include "devices/Keyboard.h"
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#include "devices/PCSPK.h"
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#include "devices/PIT.h"
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#include "devices/VESA.h"
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#include "kernel/allocator/BumpAllocator.h"
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#include "kernel/allocator/LinkedListAllocator.h"
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@ -22,24 +23,26 @@
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#include "kernel/interrupts/IntDispatcher.h"
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#include "kernel/interrupts/PIC.h"
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#include "kernel/threads/Scheduler.h"
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#include "devices/PIT.h"
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extern CPU cpu; // CPU-spezifische Funktionen
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extern PCSPK pcspk; // PC-Lautsprecher
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extern CGA_Stream kout; // Ausgabe-Strom fuer Kernel
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extern Keyboard kb; // Tastatur
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extern IntDispatcher intdis; // Unterbrechungsverteilung
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extern BIOS bios; // Schnittstelle zum 16-Bit BIOS
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extern VESA vesa; // VESA-Treiber
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extern PIC pic; // Interrupt-Controller
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extern IntDispatcher intdis; // Unterbrechungsverteilung
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extern PIT pit; // Zeitgeber
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extern unsigned int total_mem; // RAM total
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extern unsigned long systime; // wird all 10ms hochgezaehlt
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extern Keyboard kb; // Tastatur
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extern PCSPK pcspk; // PC-Lautsprecher
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// extern BumpAllocator allocator;
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// extern LinkedListAllocator allocator;
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extern TreeAllocator allocator;
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extern Scheduler scheduler;
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extern BIOS bios; // Schnittstelle zum 16-Bit BIOS
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extern VESA vesa; // VESA-Treiber
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constexpr bool DEBUG = true;
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extern unsigned int total_mem; // RAM total
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extern unsigned long systime; // wird all 10ms hochgezaehlt
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#endif
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@ -41,12 +41,12 @@ void Scheduler::ready(Thread* that) {
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/* hier muss Code eingefuegt werden */
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// Thread-Wechsel durch PIT verhindern
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cpu.disable_int ();
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cpu.disable_int();
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this->readyQueue.enqueue(that);
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// Thread-Wechsel durch PIT jetzt wieder erlauben
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cpu.enable_int ();
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cpu.enable_int();
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}
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/*****************************************************************************
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@ -62,7 +62,7 @@ void Scheduler::exit() {
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/* hier muss Code eingefuegt werden */
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// Thread-Wechsel durch PIT verhindern
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cpu.disable_int ();
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cpu.disable_int();
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Thread& next = *(Thread*)this->readyQueue.dequeue();
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this->dispatch(next);
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@ -87,12 +87,12 @@ void Scheduler::kill(Thread* that) {
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/* hier muss Code eingefuegt werden */
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// Thread-Wechsel durch PIT verhindern
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cpu.disable_int ();
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cpu.disable_int();
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this->readyQueue.remove(that);
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// Thread-Wechsel durch PIT jetzt wieder erlauben
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cpu.enable_int ();
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cpu.enable_int();
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}
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/*****************************************************************************
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@ -118,7 +118,7 @@ void Scheduler::yield() {
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}
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// Thread-Wechsel durch PIT verhindern
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cpu.disable_int ();
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cpu.disable_int();
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Thread& next = *(Thread*)this->readyQueue.dequeue();
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this->readyQueue.enqueue(this->get_active());
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@ -132,7 +132,7 @@ void Scheduler::yield() {
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* schaltet auf den naechsten Thread um, sofern einer vor- *
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* handen ist. *
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*****************************************************************************/
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void Scheduler::preempt () {
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void Scheduler::preempt() {
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/* Hier muss Code eingefuegt werden */
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@ -142,7 +142,7 @@ void Scheduler::preempt () {
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}
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// Thread-Wechsel durch PIT verhindern
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cpu.disable_int ();
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cpu.disable_int();
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Thread& next = *(Thread*)this->readyQueue.dequeue();
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this->readyQueue.enqueue(this->get_active());
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@ -52,9 +52,8 @@ public:
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// CPU freiwillig abgeben und Auswahl des naechsten Threads
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void yield();
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// Thread umschalten; wird aus der ISR des PITs gerufen
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void preempt ();
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void preempt();
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};
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#endif
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@ -36,10 +36,10 @@ struct ThreadState {
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void* esp;
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// nachfolgend die fluechtige Register
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// wichtig fuer preemptives Multitasking
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void *eax;
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void *ecx;
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void *edx;
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void *efl;
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void* eax;
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void* ecx;
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void* edx;
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void* efl;
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};
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#endif
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@ -15,9 +15,9 @@
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#include "kernel/threads/IdleThread.h"
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#include "user/CoopThreadDemo.h"
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#include "user/HelloWorldThread.h"
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#include "user/VBEdemo.h"
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#include "user/PCSPKdemo.h"
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#include "user/PreemptiveThreadDemo.h"
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#include "user/VBEdemo.h"
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int main() {
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kout.clear();
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@ -1,8 +1,8 @@
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#ifndef __pre_loopthread_include__
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#define __pre_loopthread_include__
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#include "kernel/threads/Thread.h"
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#include "kernel/Globals.h"
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#include "kernel/threads/Thread.h"
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class PreemptiveLoopThread : public Thread {
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